Measles is a highly contagious viral illness which spreads between humans via physical contact and airborne transmission through coughing, sneezing, laughing, and talking. The responsible virus is a single-stranded enveloped RNA with one serotype. Prior to availability of the vaccine in the sixties, several million people in the United States acquired the illness every year [1, 2, 3].
Worldwide, approximately 20 million people currently get the infection each year, and it leads to death in 146,000 individuals .
By the turn of the 21st century, the United States declared the disease eliminated. Elimination means the infection is not present very much anymore in a geographic area of the globe. That is not synonymous with eradication, in which there are no cases anywhere in the world as is the case with smallpox [1, 2].